Actually, it's not the testicles that swell due to neglect...

The scary part is "professional" fireworks are actually more dangerous. I saw an experiment done to determine the feasability of "safe bunkers" from land/sea steel shipping containers - so the "professionals" can run for cover if something goes wrong.

Turns out, a 10 inch shell has plenty enough velocity to rip clean through one side of a steel shipping container, and then blow up on the inside.

That's more correctly referred to as a track-hoe instead of a steam shovel. Incidently, they are a tremendous amount of fun to operate.

Bill Frist has some questionable ethics. As a young medical student he would adopt homeless cats and then use them to "practice" surgical procedures in his apartment.

He said so himself in his book:
Link